Genesis Analysis and Stability Evaluation of Karst Area in the Mudengdong Village Based on the Geological Investigation and Numerical Simulation Methods

Table 1

Features of the karst collapse points (or funnels) in the study area.

Observation point	Location	Morphology and characteristics	Causes
LT1	Gentle slope platform	An ellipse with a length of 2 m and a width of 3 m, and a vertical settlement of 1.5 m	Dissolution, mainly by surface rainwater infiltration
LT9	Foot of slope	An ellipse with a length of 0.5 m and a width of 0.4 m, and a vertical settlement of 0.9 m	Dissolution, but predominantly induced by earthquakes
LT5	Gentle slope platform	An ellipse with a length of 4 m in length and a width of 3 m, and a vertical settlement of 2-3 m	Dissolution, but predominantly induced by earthquakes
LT8	A basin surrounded by mountains on all sides	An ellipse with a length of 0.5 m and a width of 0.4 m, and a vertical settlement of 0.5 m	Dissolution, mainly by surface rainwater infiltration
LT15	Foot of the halfway hill slope	An oval shape with a length of 1.5 m and a width of 0.8 m, and a depth of about 8m	Dissolution, mainly by surface rainwater infiltration